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Section 1: Why do metals tarnish? ; Children: ... describe how metals change due to exposure to the air, eg iron rusts, silver becomes dull, copper darkens ... 1. Why do metals tarnish?
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www.standards.dfes.gov.uk/schemes2/secondary_science/sc...
www.standards.dfes.gov.uk/schemes2/secondary_science/sci09f/?view=list&column=outcome
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im in my sceince lesson now and its a layer of corrosion that causes the metal to rust or errode
http://wiki.answers.com/Q/Why_Do_metals_tarnish
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name Lisa B. status educator age 40s Question - Why does metals tarnish? ------------------- Lisa, There are "precious" few metals that are resistant to tarnish. Such discoloration occurs when the metal is able to react with or be attacked by something that can make a chemical compound with the underlying metal.
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www.newton.dep.anl.gov/askasci/chem03/chem03024.htm
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contrast the permanent uncorroded state of gold, eg an old gold necklace, with the rapid corrosion of other metals, eg a new iron hinge.
http://www.docbrown.info/ks3chemistry/9Fnotes.htm
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Re: What elements/compounds tarnish raw metals such as Cu, Mg, Ag, and Al. Date: Mon Mar 9 22:47:03 1998; Posted By: John Christie, Faculty, School of Chemistry, La Trobe University, Bundoora, Victoria, Australia;
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www.madsci.org/posts/archives/mar98/889541118.Ch.r.html
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Re: Effect of salt and vinegar to tarnish on pennies Area: Chemistry ; Posted By: Myron Cagan, Staff Engineer, New Product/process development-microelectronics, Read-Rite Corp.; Date: Wed Oct 22 10:51:31 1997;
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www.madsci.org/posts/archives/dec97/877613842.Ch.r.html
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Corrosion inhibitors protect precious metals against tarnish and corrosion which causes damages in excess of $276 billion worldwide. This corrosion inhibitors range from liquid rubs, creams, swiping material, packaging material and many other forms. ... Anti Tarnish Jewelry Box...
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www.interceptjewelrycare.com/corrosion-inhibitors.htm
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Radiance 2000 Jewelry Polisher gently cleans, polishes and shines tarnish from gold, platinum, titanium and palladium jewelry. Remove brown-colored tarnish from platinum and black-colored tarnish from gold and sterling silver so these metals will be able to shine again - like new again.
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